:root{--primary:#1a5fb4;--primary-light:#3584e4;--primary-dark:#1c71d8;--secondary:#c061cb;--success:#26a269;--warning:#e5a50a;--danger:#c01c28;--info:#62a0ea;--bg-primary:#f6f5f4;--bg-secondary:#fff;--bg-tertiary:#fafafa;--bg-surface:hsla(0,0%,100%,.85);--bg-card:hsla(0,0%,100%,.95);--text-primary:#241f31;--text-secondary:#5e5c64;--text-tertiary:#9a9996;--text-inverse:#fff;--border-color:#e0e0e0;--border-radius:12px;--border-radius-sm:8px;--border-radius-lg:16px;--border-radius-xl:24px;--shadow-sm:0 1px 3px rgba(0,0,0,.08);--shadow-md:0 2px 6px rgba(0,0,0,.08);--shadow-lg:0 4px 12px rgba(0,0,0,.08);--shadow-xl:0 8px 24px rgba(0,0,0,.08);--spacing-xs:4px;--spacing-sm:8px;--spacing-md:12px;--spacing-lg:16px;--spacing-xl:24px;--spacing-xxl:32px;--transition-fast:0.15s cubic-bezier(0.4,0.0,0.2,1);--transition-normal:0.25s cubic-bezier(0.4,0.0,0.2,1);--transition-slow:0.4s cubic-bezier(0.4,0.0,0.2,1);--backdrop-blur:blur(12px);--font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Inter","Cantarell",sans-serif;--font-family-mono:"Monaco","Cascadia Code","Consolas",monospace}@media (prefers-color-scheme:dark){:root{--primary:#3584e4;--primary-light:#62a0ea;--primary-dark:#1c71d8;--secondary:#c061cb;--success:#26a269;--warning:#e5a50a;--danger:#e01b24;--info:#62a0ea;--bg-primary:#1e1e1e;--bg-secondary:#242424;--bg-tertiary:#2d2d2d;--bg-surface:rgba(40,40,40,.85);--bg-card:rgba(45,45,45,.95);--text-primary:#fff;--text-secondary:#c0bfc6;--text-tertiary:#77767b;--border-color:#3d3d3d;--shadow-sm:0 1px 3px rgba(0,0,0,.3);--shadow-md:0 2px 6px rgba(0,0,0,.3);--shadow-lg:0 4px 12px rgba(0,0,0,.3);--shadow-xl:0 8px 24px rgba(0,0,0,.3)}}*{margin:0;padding:0;box-sizing:border-box}body{font-family:var(--font-family);color:var(--text-primary);line-height:1.5;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}.pdf-manager,body{background:var(--bg-primary)}.pdf-manager{min-height:100vh}.pdf-manager,header{padding:var(--spacing-lg)}header{margin-bottom:var(--spacing-xl);background:var(--bg-card);backdrop-filter:var(--backdrop-blur);border-radius:var(--border-radius-lg);box-shadow:var(--shadow-sm);border:1px solid var(--border-color)}.header-content{gap:var(--spacing-lg)}.header-content,.header-icon{display:flex;align-items:center}.header-icon{width:56px;height:56px;background:linear-gradient(135deg,var(--primary) 0,var(--primary-light) 100%);border-radius:var(--border-radius-lg);justify-content:center;flex-shrink:0}.header-icon i{font-size:24px;color:#fff}.header-text h1{font-size:1.5rem;font-weight:700;color:var(--text-primary);margin-bottom:var(--spacing-xs)}.subtitle{color:var(--text-secondary);font-size:.875rem;font-weight:400}.main-layout{display:flex;gap:var(--spacing-xl);margin-bottom:var(--spacing-xl)}@media (max-width:1024px){.main-layout{flex-direction:column;gap:var(--spacing-lg)}}.left-column{flex:1;min-width:340px;max-width:420px}.right-column{flex:1.5;min-width:0}.card{background:var(--bg-card);backdrop-filter:var(--backdrop-blur);border-radius:var(--border-radius-lg);border:1px solid var(--border-color);box-shadow:var(--shadow-sm);transition:all var(--transition-normal);overflow:hidden;margin-bottom:var(--spacing-lg)}.card:hover{box-shadow:var(--shadow-md);border-color:var(--primary-light)}.section-header{display:flex;align-items:center;gap:var(--spacing-md);padding:var(--spacing-lg);border-bottom:1px solid var(--border-color);background:var(--bg-secondary)}.upload-modes{display:flex;gap:4px;background:var(--bg-tertiary);padding:2px;border-radius:var(--border-radius);border:1px solid var(--border-color)}.btn-mode{background:transparent;color:var(--text-secondary);border:none;padding:4px 12px;border-radius:var(--border-radius-sm);font-size:.75rem;font-weight:500}.btn-mode.active{background:var(--primary);color:#fff}.btn-mode:hover:not(.active){background:var(--bg-secondary)}.section-icon{width:40px;height:40px;background:var(--bg-tertiary);border-radius:var(--border-radius);display:flex;align-items:center;justify-content:center;border:1px solid var(--border-color)}.section-icon i{color:var(--primary);font-size:16px}.section-title{flex:1;display:flex;align-items:center;justify-content:space-between}.section-title h2{font-size:1.125rem;font-weight:600;color:var(--text-primary)}.file-count{color:var(--text-secondary);padding:4px 10px;border-radius:12px;font-size:.75rem;font-weight:500}.file-count,.upload-area{background:var(--bg-tertiary)}.upload-area{padding:var(--spacing-xl);text-align:center;border:2px dashed var(--border-color);border-radius:var(--border-radius-lg);margin:var(--spacing-lg);transition:all var(--transition-normal);cursor:pointer;position:relative;overflow:hidden}.upload-area.dragover,.upload-area:hover{border-color:var(--primary);background:var(--bg-secondary)}.upload-area.dragover:before{content:"";position:absolute;top:0;left:0;right:0;bottom:0;background:rgba(var(--primary-rgb),.05)}.upload-icon-container{position:relative;width:72px;height:72px;margin:0 auto var(--spacing-lg)}.upload-icon{font-size:36px;color:var(--primary);position:relative;z-index:2}.upload-icon-ring{position:absolute;top:0;left:0;right:0;bottom:0;border:2px solid var(--primary);border-radius:50%;opacity:.2}.upload-text{font-size:1rem;font-weight:500;color:var(--text-primary);margin-bottom:var(--spacing-xs)}.upload-hint{color:var(--text-tertiary);font-size:.875rem;margin-bottom:var(--spacing-sm)}.upload-mode-info{display:flex;align-items:center;justify-content:center;gap:6px;font-size:.75rem;color:var(--text-secondary);margin-bottom:var(--spacing-lg);padding:4px 12px;background:var(--bg-secondary);border-radius:var(--border-radius);border:1px solid var(--border-color)}.upload-mode-info i{color:var(--primary)}.browse-btn{margin-top:var(--spacing-md);padding:10px 24px;font-size:.875rem;font-weight:500}.file-info{margin:0 var(--spacing-lg) var(--spacing-md);padding:var(--spacing-md);background:var(--bg-tertiary);border-radius:var(--border-radius);border:1px solid var(--border-color);display:none}.file-info.show{display:block}.file-name{display:flex;align-items:center;gap:var(--spacing-md)}.file-name i{color:var(--primary);font-size:18px}.file-name-text{display:flex;flex-direction:column;gap:2px;flex:1}.file-name-main{font-weight:500;color:var(--text-primary);font-size:.875rem;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.file-size{font-size:.75rem;color:var(--text-tertiary)}.btn-clear-file{width:24px;height:24px;padding:0;background:var(--bg-secondary);color:var(--text-tertiary);border:1px solid var(--border-color)}.btn-clear-file:hover{background:var(--danger);color:#fff;border-color:var(--danger)}.multiple-files-info{margin:0 var(--spacing-lg) var(--spacing-md);border:1px solid var(--border-color);border-radius:var(--border-radius);overflow:hidden}.multiple-files-header{display:flex;align-items:center;justify-content:space-between;padding:var(--spacing-md);background:var(--bg-tertiary);border-bottom:1px solid var(--border-color)}.multiple-files-title{display:flex;align-items:center;gap:8px;font-size:.875rem;font-weight:500;color:var(--text-primary)}.multiple-files-title i{color:var(--secondary)}.multiple-files-total{margin-left:8px;padding:2px 8px;border-radius:10px}.btn-clear-all,.multiple-files-total{background:var(--bg-secondary);font-size:.75rem;color:var(--text-secondary);border:1px solid var(--border-color)}.btn-clear-all{padding:4px 12px}.btn-clear-all:hover{background:var(--danger);color:#fff;border-color:var(--danger)}.multiple-files-list{max-height:200px;overflow-y:auto;background:var(--bg-card)}.multiple-file-item{display:flex;align-items:center;justify-content:space-between;padding:var(--spacing-md);border-bottom:1px solid var(--border-color);transition:background 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var(--transition-fast)}.file-select-checkbox:checked{background-color:var(--primary);border-color:var(--primary)}.file-icon{width:40px;height:40px;background:linear-gradient(135deg,var(--primary) 0,var(--primary-light) 100%);border-radius:var(--border-radius);display:flex;align-items:center;justify-content:center;flex-shrink:0;margin-right:12px;box-shadow:0 2px 4px rgba(0,0,0,.1)}.file-icon i{color:#fff;font-size:18px}.file-details{flex:1;min-width:0;overflow:hidden}.file-details h3{font-size:.9375rem;margin-bottom:4px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}.file-item{padding:var(--spacing-md);border-radius:var(--border-radius);margin-bottom:4px;background:var(--bg-secondary);border:1px solid transparent;transition:all var(--transition-fast);cursor:pointer;position:relative}.file-item,.file-item-info{display:flex;align-items:center;gap:12px}.file-item-info{flex:1;min-width:0}@media (max-width:768px){.file-details h3{-webkit-line-clamp:1}.file-item{padding:12px;gap:8px}.file-icon{width:36px;height:36px;min-width:36px}.file-icon i{font-size:16px}}.file-item:hover .file-details h3{overflow:visible;white-space:normal;position:relative;z-index:5;background:var(--bg-tertiary);padding:4px 8px;border-radius:var(--border-radius-sm);margin:-4px -8px;box-shadow:var(--shadow-md);max-height:100px;overflow-y:auto}@media (hover:none){.file-details h3{white-space:normal;word-break:break-word;-webkit-line-clamp:2;display:-webkit-box}.file-item:hover .file-details h3{overflow:hidden;white-space:normal;padding:0;margin:0;box-shadow:none;background:transparent}}.file-actions{display:flex;gap:4px;margin-left:auto;flex-shrink:0}.action-btn{width:32px;height:32px;background:var(--bg-tertiary);border:1px solid var(--border-color);border-radius:var(--border-radius);color:var(--text-secondary);cursor:pointer;transition:all var(--transition-fast);display:flex;align-items:center;justify-content:center}.action-btn:hover{background:var(--primary);color:#fff;border-color:var(--primary);transform:translateY(-1px);box-shadow:0 2px 4px rgba(0,0,0,.1)}.action-btn.preview-btn:hover{background:var(--info);border-color:var(--info)}.action-btn.download-btn:hover{background:var(--success);border-color:var(--success)}.empty-state{text-align:center;padding:var(--spacing-xl);color:var(--text-tertiary);background:var(--bg-tertiary);border-radius:var(--border-radius);margin:0 var(--spacing-lg);border:1px dashed var(--border-color)}.empty-state i{font-size:48px;margin-bottom:var(--spacing-lg);color:var(--border-color);opacity:.6}.empty-state h3{font-size:1.125rem;font-weight:600;color:var(--text-secondary);margin-bottom:var(--spacing-sm)}.empty-state p{font-size:.875rem;color:var(--text-tertiary);max-width:300px;margin:0 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rgba(var(--primary-rgb),.1)}.keyword-search-container{margin:var(--spacing-lg);padding:var(--spacing-lg);background:var(--bg-card);border-radius:var(--border-radius-lg);border:1px solid var(--border-color)}.search-header{display:flex;align-items:center;gap:var(--spacing-sm);margin-bottom:var(--spacing-lg)}.search-header h3{font-size:1rem;font-weight:600;color:var(--text-primary)}.search-header i{color:var(--primary)}.search-interface{display:flex;flex-direction:column;gap:var(--spacing-lg)}.manual-select-wrapper,.search-input-wrapper{display:flex;gap:var(--spacing-sm)}.input-with-icon{position:relative;flex:1}.input-with-icon i{position:absolute;left:12px;top:50%;transform:translateY(-50%);color:var(--text-tertiary)}.manual-page-input,.search-keyword-input{width:100%;padding:10px 12px 10px 36px;background:var(--bg-secondary);border:1px solid 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